Improvement in water-meters



2 Sheets-Sheet 1.

A.. W. PococK.-

WATER-METER.

No, 182,471 Patented Sept.19, 1876.

".PETERS. PHOT-CJ-LITHDGRAPHER. WASHIHGTQN, D C.

2 Sheets-Sheetz. A. W. POCOCK.

WATER-METER. 19.182,471. Patented sept.19,1s7e.

@Wn/147A UNITED STATESA PATENT OFFICE.

ALFRED W. POCOOK, OF LONDON, ENGLAND.

IMPROVEMENT IN WATER-METERS.

Specification forming part of Letters Patent No. IS2,47 l, dated September 19, 1876; application filed June 22, 1876.

To all whom it may concern Be it known that I, ALFRED W. PooocK, of London, England, have invented a new and useful Improvement in Water-Meters, which improvement is fully set forth in the following specification, reference being had to the accompanying drawing, in which- Figure 1 represents a transverse vertical section in the plane w x, Fig. 3, looking in the direction ofthe arrow opposite to that line. Fig. 2 is a similar view in the plane y y, Fig. 3, looking in the direction of the arrow opposite to that line. Fig. 3 is a longitudinal vertical section in the plane z z, Fig. 2. Fig. 4. is a horizontal section in the plane a0' m', Fig. 3.

Similar letters indicate corresponding parts.

This invention relates to a liquid -meter, which consists of two cylinders which are closed at their bottom ends and connected together at their tops by a common valve-chamber, which forms the bearings for a double crank-shaft, the cranks of which connect with pistons working in the two cylinders. With this crank shaft is combined a valve, which travels on a valve-seat provided with four ports, which communicate, two with the lower, and the other two with the upper, parts of the cylinders, while in the valve-chamber are formed two chambers, one of which communicates with the supply-pipe and the other with the delivery-pipe. By the motion of the valve the various ports are brought to communicate with each other, so that While the cylinders receive liquid inone part, the liquid contained in the other part is free to discharge, and that by the pressure of the liquid the pistons are caused to reciprocate, the crankshaft is caused to revolve, and, by a suitable connection between the crank-shaft and a registering mechanism, the quantity of liquid passing through the meter is recorded. The valve is placed loosely on an eccentric disk, which is firmly secured to the crank-shaft, so that the pressure of the liquid keeps the valve down on its seat.

In the drawing, the lettersAB designate two cylinders, each of which contains a piston, A and B', and which are closed at their bottom ends, and connected at their tops by a coinmon valve-chamber, (l. This valve-chamber is provided with a valve seat, D, on which works an annular valve, E, which is fitted loosely on an eccentric disk, F, that is secured firmly on a shaft, G, which has its bearings in partitions H I, extending transversely through the valve-chamber. Between the partitions is situated a chamber, J, which communicates, by means of a channel, e, Fig. 3, with the supply-pipe K, and in the partition l is formed a chamber, L, which communicates, through a channel, f, Figs. 2 and 3, with the deliverypipe lll.

In the valve-seat D are four ports, a b c d, which communicate with the two cylinders A B, as follows: rPhe port a, through a channel, a', with the lower part of the cylinder A; the port b, through channels b and b', with the lower part of the cylinder B 5 the port d, through a channel, d0, with the upper part of cylinder B. If the valve occupies the position shown in Fig. 1, the lower part of the cylinder A communicates, through a channel, a', and port a, and through the hollow part of the valve E, with the chamber L, which communicates with the delivery-pipe M. The upper part of the cylinder A communicates, through port c, with the chamber J and supply-pipe K, and the lower part of the cylinder B communicates, through channels b 19 and .port b, also with the chamber J and supplypipe K 5 and if the liquid (which must have a certain pressure or head) is admitted to the meter, the piston in the cylinder A is forced down and that in the cylinder B is forced up, and the liquid contained in the lower part of the cylinder A and in the upper part of cylinder B is forced out through the delivery-pipe.

On the shaft G are firmly secured two cranks, O P, at right angles to each other. The cranks connect, by pitmenrods Q B, with the two pistons, and as these pistons move by the pressure of the liquid, the shaft G is caused to revolve. By the time .the crank O, Fig. 3, passes its lower center, the crank P is at its half center and the valve has assumed such a position that the port c is covered, and the liquid from the supply-pipe flows only to the lower part of the cylinder B. When the crank O has passed its lower center, the port a becomes uncovered, and the liquid flows to the lowerparts of both cylinders until the crank P reaches its upper center; then the port b is closed; and when the crank P has passed its upper center, the port d becomes uncovered and the liquid flows to the upper part of cyl inder B as well as to the lower part of cylinder A. y

From this description it will be seen'that in my meter no dead-point is possible; for when either of the cranks passes one of its deadw .that when the meter is at rest no liquid can pass through it, and, consequently, al-l the liquid which passes through the meter must be correctly measured.

Thel registering device S receives its motion by a worm, m, on theA shaft G, which gears in a worm-wheel mounted on a spindle, ,vthat extends out through the top of the valvechamber, and is geared together with the registering-wheels. For the purpose of registering, any mechanism suitable for this purpose may be employed.

What I claim asnew, and desire to secure- The combination, in aliquidmeter, of two pistons working in suitable cylinders, a double crankshaft, a valve, a valve-chamber provided with two partitions formin gone chamber,which communicates with: thek .supply-pipe, and another` chamber, which communicates with the delivery-pipe, and a valve-seat, provided with lfour ports, two of which communicate with the lower,'and the other two with the upper, parts of the two cylinders, all constructed andv operatingsubstantially as shown and de- In testimony that I claim the'foregoing I have hereunto set my hand.

ALFD.. WILLIAM POOOGK.

Witnesses CHARLES CROFT, JNO. EDD. SMITH. 

